Heart Conduction SystemPurkinje FibersPurkinje CellsStrophanthidinAction PotentialsDogsMembrane PotentialsNerve FibersSheepHeartMyocytes, CardiacCerebellumArrhythmias, CardiacMicroelectrodesPotassiumSodiumElectrophysiologyLidocaineMyocardial ContractionCerebellar CortexImpulse Control DisordersElectric StimulationTime FactorsHeart VentriclesCardiac OutputMuscle Fibers, SkeletalCalciumDietary FiberVentricular FunctionMyocardiumTetrodotoxinIon ChannelsCardiac GlycosidesBenzocaineCesiumPapillary MusclesElectric ConductivityCardiac Pacing, ArtificialDigitalis GlycosidesNisoldipineCardiac Surgical ProceduresOuabainDeath, Sudden, CardiacMinke WhaleEndocardiumBundle of HisAnti-Arrhythmia AgentsGallopamilMice, Neurologic MutantsRefractory Period, ElectrophysiologicalNeural ConductionRabbitsMineral FibersElectrocardiographySinoatrial NodeQuinidineBariumMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchDioxanesAminopyridinesModels, CardiovascularAequorinDendritesCotton FiberConnexinsSodium ChannelsCatsIsoproterenolHeart RateIncubatorsKineticsMyofibrilsTolazamidePatch-Clamp TechniquesPericardiumFur SealsChloridesBarium CompoundsHalothaneDisopyramideCerebellar NucleiAxonsMusclesNeurons, AfferentMuscle ContractionStrontiumCardiomegalyProcainamideCardiac TamponadeCardiac Complexes, PrematureBiological Transport, ActiveGuinea PigsHeart AtriaNerve Fibers, MyelinatedHeart DiseasesSynapsesAcetohexamideRyanodineCattle